Sidelink Safety Message Timing Using Collision Risk Thresholds
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and optimally transmitting safety messages in vehicle-to-everything (V2X) scenarios, particularly in determining the timing for transmitting safety messages based on changing collision risk ranges, which are influenced by mobility information from adjacent user equipment (UE) in sidelink communications.
Innovation Solution
A method is introduced where user equipment (UE) in a wireless communication system receives sidelink signals containing mobility information from adjacent UEs, calculates a collision risk range, and determines the transmission of safety messages by applying an estimation threshold value derived from decentralized environmental notification messages (DENMs), which can be dynamically adjusted based on environmental conditions and vehicle type information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If safety messages are transmitted frequently to ensure timely safety information, then transmission timeliness is improved, but system resource consumption increases
Solution Approach 1:
The patent implements dynamic transmission timing adjustment based on real-time collision risk assessment. The UE determines transmission timing by evaluating collision risk ranges calculated from mobility information of adjacent UEs and environmental factors from DENM messages, rather than using fixed periodic transmission. This dynamic approach transmits safety messages only when necessary, improving timeliness while reducing unnecessary resource consumption during low-risk periods.
Solution Approach 2:
The system changes transmission parameters (timing, frequency) based on varying collision risk conditions. By adjusting the transmission strategy according to calculated collision risk ranges and environmental factors, the system optimizes the balance between transmission timeliness and resource consumption, transmitting more frequently when risk is high and less frequently when risk is low.
2Measurement precision
If collision risk range is expanded to cover more environmental factors, then measurement precision is improved, but calculation complexity increases
Solution Approach 1:
The patent segments the collision risk assessment into distinct components: mobility information from sidelink signals, environmental factors from DENM messages, and threshold comparisons. By dividing the complex assessment into separate processing stages with specific input data types, the system achieves comprehensive risk evaluation while managing calculation complexity through structured, modular processing.
3Manufacturing precision
If transmission timing is adjusted dynamically based on collision risk, then transmission accuracy is improved, but control complexity increases
Solution Approach 1:
The system performs preliminary calculations of collision risk ranges using mobility information and environmental factors before determining transmission timing. By pre-assessing collision risk and preparing transmission decisions in advance based on calculated parameters, the system achieves accurate transmission timing while reducing the complexity of real-time control decisions during critical moments.
Data Source
AI summary
According to various embodiments, a method for transmitting a safety message, by a UE, in a wireless communication system supporting sidelink, and an apparatus therefor are disclosed. The method for transmitting a safety message, by a UE, in a wireless communication system supporting sidelink comprises the steps of: receiving, from an adjacent UE, a sidelink signal including mobility information on the adjacent UE; calculating a collision risk range for the adjacent UE on the basis of the mobility information on the adjacent UE; and determining whether to transmit a safety message on the basis of the collision risk range to which an estimated threshold value has been applied, wherein the estimated threshold value is determined on the basis of a received decentralized environmental notification message (DENM).